Rotary compressor



E. WILSON. ROTARY COMPRESSOR.

Feb 6, 1923.,

3 SHEET -SHEET1.

FILED FEB-27,1920.

Feb; 6, 1923. L l i-4AM) E. WILSON.

ROTARY COMPRESSOR.

FILED FEB-27.1920. 3 SHEETS-SHEET 2.

Patented Feh. (5, 1223.. I

UNHTED STATES EDWARD WILSON, OF ST.

LOUIS, MISSOURI, ASSIGNOR OF (ENE-HALE TO WTLELLTAIE EIIORGAN, 015 ST.LOUIS, IREISSQUEI.

ROTARY COMPRESSQE.

Application filed. February 27, 1920. Serial No. 361,395

To all whom it may concern."

Be it known that I, EDWARD VILSON, a citizen of the United States ofAmerica, and a resident of the city of St. Louis and State of Missouri,have invented certain new and useful Improvements in Rotary Compressors, of which'the following is a specification containing a full.clear, and exact description, reference being had to the accompanyingdrawings, forming a part thereof. My invention relates to improvementsin rotary compressors, and has for its primary object the constructionof a rotary compressor wherein the rotating cylinder has a central selfalining bearing secured to its outside periphery, and which cylinder andbearing are eccentrically mounted in regard to the casing and the rotor.

A further object is to construct a rotor 29 piston which is designedprincipally for a IOtary. compressor which is hingedly connected to therotor and held against the cyl inder by the combined action ofcentrifugal force and the pressure set up in the cylinder when thecompressor is placed in operation.

In the drawings:

. Fig. 1 is a vertical longitudinal section of a compressor embodying mydevice;

Fig. 2 a cross sectional View of the cylinder showing the rotor androtor piston in position with parts thereof broken away and y insection;

Fig. 3 an end view of the rotor;

Fig. 4 a fragmental perspective View of the rotor piston;

Fig. 5 a fragmental perspective of the hinge member for connecting therotor piston to the rotor.

Fig. 6 is a vertical cross section taken through the housing 6 throughthe ring 13 and bearing 14 showing the cylinder in end elevation. Fig. 7is an end view of the housing 6, showing the adjusting spring 45 and thespring tensioning pin in position.

Fig. 8 is a fragmental view of a portion of the housing 6, showing themanner of securing the spring tensioning pin therein.

In the construction of my device I make 50 use of the two piece housing6 and 6 This housing is provided with the inlet port 7 and the outletport 8 and the stufiing boxes 9 and 10. Approximately midway the lengthof the stufiing boxes is formed an 65 enlargement 11. which is providedwith an eccentric internal bore 12, into which the eccentric ring 13 isplaced. Within this eccentric ring is mounted a self alining ballbearing ltwhich in turn is secured on the outside of the cylinder 15 bymeans of the flange 16 and the nut 17.

Within the cylinder is located the rotor 18, this rotor beingeccentrically mounted in the cylinder as is clearly illustrated in Fig.2. The rotor is provided on both of its ends with a rib 19. This rib isdesigned to contact with the floating cylinder heads 20 which are heldagainst this rib by the pressure setup within the casing 11, and areheld sulhciently tight against the rotor by this pressure to preventleakage from the cylinder through its ends adjacent the cylinder heads.in the outer face of the rotor is formed a recess21, this recess havingone portion terminating in a cylindrical recess or socket 22, whichrecess is open adjacent the recess 21 as indicated by the numeral 23.Within this recess 22 is inserted the cylindrical portion 24: of thehinge member 25. This hinge member is inserted from one end of thecylinder and when in place cannot be removed from the recess 22 exceptby longitudinal movement.

On the end of the hinge member 25 opposite the cylindrical end 24 isformed another cylindrical end 26 whichis adapted in be seated in therecess or socket 27 formed in the piston shoe 28. This shoe has theouter curved surface 29 and a forward angular face 30.

Secured to or formed integral with the rotor 18 is a shaft 31, andformed through the shaft 31 and through the rotor is a bore 32.Connecting this bore 32 with the outside periphery of the rotor is anopening 33 which opens into a chamber at the rear of the piston. Thischamber is crescent shape in form, and is caused by the differ-- ence indiameter of the rotor and cylinder and by the eccentricmounting of thetwo.

When the rotor is in the position as shown in Fig. 2, a passageway 35 isformed be tween theshoe 28 and the bottom of the re cess 21, andextending from the bottom of this recess into the rotor is a bore 36 inwhich a check valve'37 is mounted, the bore 36 connecting thelongitudinal bore 38 which extends parallel to the bore 32 and opens onboth sides of the rotor into the space 39, and. from thence into thecasing 11.,

The portions 6 and 6 are secured together by means of a ring 40. Theportion 6 being provided with a projecting circular tongue 41 which fitsinto the groove formed 1n the portion 6 and is for the purpose ofpreventing leakage, or in other words, make an air-tight joint. Theeccen- A in Fig. 2, while the cylinder revolves in the direction: shownby the arrow B, Fig. 2. When sufficient speed has been attained, thecentrifugal force will have a tendency to throw the shoe 28 outwardagainst the inner face of the cylinder 15. The cylinder 15 is at thesame time revolving due to the rolling contact between the rotor and thecylinder, and as this rotation continues, the gas ahead of therotorblade is gradually compressed and forced through the valve 37intothe bore 38, and thence into the casing 11. This action will continueuntil bymeans of the eccentric mounting of the rotor and cylinder theshoe 28 is gradually forced completely into the rotor. This will be atthe point of contact between the rotor and cylinder.

' inder surface.

After this point of contact has been passed, the centrifugal force willtend to force the shoe and hinge member 25 outwardly and maintain a veryclose contact with the cyl- This contact increases as the pressureagainst the face 30 of the shoe and hinge member increases, so that thegreater the pressure ahead of the shoe the tighter the shoe will beforced against the cylinder walls and leakage prevented.

In an application filed by me, May 7, 1918, Serial No. 233,040, I haveclaimed broadly- A- housing, a compression cylinder, a rotoreccentrically mounted therein, a rotor piston carried by said rotor,means for adjusting said compression cylinder towards the rotor and atright angles to the axis of.

rotation of said rotor, also floating heads for the cylinder, saidfloating heads being held in fluid contact with the ends of the rotor bygas pressure within the housing.

casing, a se f alining ball bearing eccentrically mounted in saidcasing, a compression cylinder secured within said self alining bearing.and concentric therewith, a

rotor eccentrically mounted within the compression cylinder, a floatinghead located in each end of the compression cylinder and contacting withthe rotor, a piston hingedly connected to said rotor, its outerend'adapted to contact with the inner. face of the compression cylinder,a recess formed in the rotor, said recess adapted to receive thepiston-so that the same may be wholly contained Within the rotor at onepoint of its 'revolution.

2. A rotary air compressor comprising a casing, a self alining ballbearing eccentrically mounted in said casing, a compres- ,sion cylindersecured within said self alining bearing and concentric therewith, arotor eccentrically mounted within the compression cylinder, a floatinghead located in each end of the compression cylinder and contacting withthe rotor, a shoe adapted to contact with the inner face of thecompression cylinder, a socket formed in said shoe, a hinge member,cylindrical enlargements formed on two of the parallel edges, one ofsaid cylindrical enlargements adapted to be inserted in the socketformed in the shoe, a longitudinal recess formed in the rotor, a socketformed in one edge of the recess, said socket adapted to receive theother cylindrical enlargement formed on the hinge member, said hinge andshoe when so mounted being capable ofcontacting with the inner face ofthe compression cylinder, or being folded within the longitudinalrecess.

3. In a rotary air compressor, a sectional casing, a compressioncylinder mounted within said casing, a rotor eccentrically mounted insaid compression cylinder, floating heads 'for said cylinder, a selfalining ball bearing mounted in the casing and central of thecompression cylinder, and an eccentric ring mountedin the casing andaround the ball bearing for adjusting the compression cylinder to aiid'from the rotor.

- In testimony whereof I have signed my name to this specification.

' EDWARD WILSON.

